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author | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-05-04 14:18:53 +0000 |
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committer | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-05-04 14:18:53 +0000 |
commit | a0e0018c9a7ef5ce7f6d2c3ae16aecbbd16a8f67 (patch) | |
tree | 8feaf1a1932871b139b3b30be4c09c66489918be /bridge/link.c | |
parent | Initial commit. (diff) | |
download | iproute2-upstream/6.1.0.tar.xz iproute2-upstream/6.1.0.zip |
Adding upstream version 6.1.0.upstream/6.1.0upstream
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
Diffstat (limited to '')
-rw-r--r-- | bridge/link.c | 610 |
1 files changed, 610 insertions, 0 deletions
diff --git a/bridge/link.c b/bridge/link.c new file mode 100644 index 0000000..fef3a9e --- /dev/null +++ b/bridge/link.c @@ -0,0 +1,610 @@ +/* SPDX-License-Identifier: GPL-2.0 */ + +#include <stdio.h> +#include <stdlib.h> +#include <unistd.h> +#include <time.h> +#include <sys/socket.h> +#include <sys/time.h> +#include <netinet/in.h> +#include <linux/if.h> +#include <linux/if_bridge.h> +#include <string.h> +#include <stdbool.h> + +#include "json_print.h" +#include "libnetlink.h" +#include "utils.h" +#include "br_common.h" + +static unsigned int filter_index; + +static const char *stp_states[] = { + [BR_STATE_DISABLED] = "disabled", + [BR_STATE_LISTENING] = "listening", + [BR_STATE_LEARNING] = "learning", + [BR_STATE_FORWARDING] = "forwarding", + [BR_STATE_BLOCKING] = "blocking", +}; + +static const char *hw_mode[] = { + "VEB", "VEPA" +}; + +static void print_link_flags(FILE *fp, unsigned int flags, unsigned int mdown) +{ + open_json_array(PRINT_ANY, is_json_context() ? "flags" : "<"); + if (flags & IFF_UP && !(flags & IFF_RUNNING)) + print_string(PRINT_ANY, NULL, + flags ? "%s," : "%s", "NO-CARRIER"); + flags &= ~IFF_RUNNING; + +#define _PF(f) if (flags&IFF_##f) { \ + flags &= ~IFF_##f ; \ + print_string(PRINT_ANY, NULL, flags ? "%s," : "%s", #f); } + _PF(LOOPBACK); + _PF(BROADCAST); + _PF(POINTOPOINT); + _PF(MULTICAST); + _PF(NOARP); + _PF(ALLMULTI); + _PF(PROMISC); + _PF(MASTER); + _PF(SLAVE); + _PF(DEBUG); + _PF(DYNAMIC); + _PF(AUTOMEDIA); + _PF(PORTSEL); + _PF(NOTRAILERS); + _PF(UP); + _PF(LOWER_UP); + _PF(DORMANT); + _PF(ECHO); +#undef _PF + if (flags) + print_hex(PRINT_ANY, NULL, "%x", flags); + if (mdown) + print_string(PRINT_ANY, NULL, ",%s", "M-DOWN"); + close_json_array(PRINT_ANY, "> "); +} + +void print_stp_state(__u8 state) +{ + if (state <= BR_STATE_BLOCKING) + print_string(PRINT_ANY, "state", + "state %s ", stp_states[state]); + else + print_uint(PRINT_ANY, "state", + "state (%d) ", state); +} + +int parse_stp_state(const char *arg) +{ + size_t nstates = ARRAY_SIZE(stp_states); + int state; + + for (state = 0; state < nstates; state++) + if (strcmp(stp_states[state], arg) == 0) + break; + + if (state == nstates) + state = -1; + + return state; +} + +static void print_hwmode(__u16 mode) +{ + if (mode >= ARRAY_SIZE(hw_mode)) + print_0xhex(PRINT_ANY, "hwmode", + "hwmode %#llx ", mode); + else + print_string(PRINT_ANY, "hwmode", + "hwmode %s ", hw_mode[mode]); +} + +static void print_protinfo(FILE *fp, struct rtattr *attr) +{ + if (attr->rta_type & NLA_F_NESTED) { + struct rtattr *prtb[IFLA_BRPORT_MAX + 1]; + + parse_rtattr_nested(prtb, IFLA_BRPORT_MAX, attr); + + if (prtb[IFLA_BRPORT_STATE]) + print_stp_state(rta_getattr_u8(prtb[IFLA_BRPORT_STATE])); + + if (prtb[IFLA_BRPORT_PRIORITY]) + print_uint(PRINT_ANY, "priority", + "priority %u ", + rta_getattr_u16(prtb[IFLA_BRPORT_PRIORITY])); + + if (prtb[IFLA_BRPORT_COST]) + print_uint(PRINT_ANY, "cost", + "cost %u ", + rta_getattr_u32(prtb[IFLA_BRPORT_COST])); + + if (!show_details) + return; + + if (!is_json_context()) + fprintf(fp, "%s ", _SL_); + + if (prtb[IFLA_BRPORT_MODE]) + print_on_off(PRINT_ANY, "hairpin", "hairpin %s ", + rta_getattr_u8(prtb[IFLA_BRPORT_MODE])); + if (prtb[IFLA_BRPORT_GUARD]) + print_on_off(PRINT_ANY, "guard", "guard %s ", + rta_getattr_u8(prtb[IFLA_BRPORT_GUARD])); + if (prtb[IFLA_BRPORT_PROTECT]) + print_on_off(PRINT_ANY, "root_block", "root_block %s ", + rta_getattr_u8(prtb[IFLA_BRPORT_PROTECT])); + if (prtb[IFLA_BRPORT_FAST_LEAVE]) + print_on_off(PRINT_ANY, "fastleave", "fastleave %s ", + rta_getattr_u8(prtb[IFLA_BRPORT_FAST_LEAVE])); + if (prtb[IFLA_BRPORT_LEARNING]) + print_on_off(PRINT_ANY, "learning", "learning %s ", + rta_getattr_u8(prtb[IFLA_BRPORT_LEARNING])); + if (prtb[IFLA_BRPORT_LEARNING_SYNC]) + print_on_off(PRINT_ANY, "learning_sync", "learning_sync %s ", + rta_getattr_u8(prtb[IFLA_BRPORT_LEARNING_SYNC])); + if (prtb[IFLA_BRPORT_UNICAST_FLOOD]) + print_on_off(PRINT_ANY, "flood", "flood %s ", + rta_getattr_u8(prtb[IFLA_BRPORT_UNICAST_FLOOD])); + if (prtb[IFLA_BRPORT_MCAST_FLOOD]) + print_on_off(PRINT_ANY, "mcast_flood", "mcast_flood %s ", + rta_getattr_u8(prtb[IFLA_BRPORT_MCAST_FLOOD])); + if (prtb[IFLA_BRPORT_BCAST_FLOOD]) + print_on_off(PRINT_ANY, "bcast_flood", "bcast_flood %s ", + rta_getattr_u8(prtb[IFLA_BRPORT_BCAST_FLOOD])); + if (prtb[IFLA_BRPORT_MULTICAST_ROUTER]) + print_uint(PRINT_ANY, "mcast_router", "mcast_router %u ", + rta_getattr_u8(prtb[IFLA_BRPORT_MULTICAST_ROUTER])); + if (prtb[IFLA_BRPORT_MCAST_TO_UCAST]) + print_on_off(PRINT_ANY, "mcast_to_unicast", "mcast_to_unicast %s ", + rta_getattr_u8(prtb[IFLA_BRPORT_MCAST_TO_UCAST])); + if (prtb[IFLA_BRPORT_NEIGH_SUPPRESS]) + print_on_off(PRINT_ANY, "neigh_suppress", "neigh_suppress %s ", + rta_getattr_u8(prtb[IFLA_BRPORT_NEIGH_SUPPRESS])); + if (prtb[IFLA_BRPORT_VLAN_TUNNEL]) + print_on_off(PRINT_ANY, "vlan_tunnel", "vlan_tunnel %s ", + rta_getattr_u8(prtb[IFLA_BRPORT_VLAN_TUNNEL])); + + if (prtb[IFLA_BRPORT_BACKUP_PORT]) { + int ifidx; + + ifidx = rta_getattr_u32(prtb[IFLA_BRPORT_BACKUP_PORT]); + print_string(PRINT_ANY, + "backup_port", "backup_port %s ", + ll_index_to_name(ifidx)); + } + + if (prtb[IFLA_BRPORT_ISOLATED]) + print_on_off(PRINT_ANY, "isolated", "isolated %s ", + rta_getattr_u8(prtb[IFLA_BRPORT_ISOLATED])); + if (prtb[IFLA_BRPORT_LOCKED]) + print_on_off(PRINT_ANY, "locked", "locked %s ", + rta_getattr_u8(prtb[IFLA_BRPORT_LOCKED])); + } else + print_stp_state(rta_getattr_u8(attr)); +} + + +/* + * This is reported by HW devices that have some bridging + * capabilities. + */ +static void print_af_spec(struct rtattr *attr, int ifindex) +{ + struct rtattr *aftb[IFLA_BRIDGE_MAX+1]; + + parse_rtattr_nested(aftb, IFLA_BRIDGE_MAX, attr); + + if (aftb[IFLA_BRIDGE_MODE]) + print_hwmode(rta_getattr_u16(aftb[IFLA_BRIDGE_MODE])); +} + +int print_linkinfo(struct nlmsghdr *n, void *arg) +{ + FILE *fp = arg; + struct ifinfomsg *ifi = NLMSG_DATA(n); + struct rtattr *tb[IFLA_MAX+1]; + unsigned int m_flag = 0; + int len = n->nlmsg_len; + const char *name; + + len -= NLMSG_LENGTH(sizeof(*ifi)); + if (len < 0) { + fprintf(stderr, "Message too short!\n"); + return -1; + } + + if (!(ifi->ifi_family == AF_BRIDGE || ifi->ifi_family == AF_UNSPEC)) + return 0; + + if (filter_index && filter_index != ifi->ifi_index) + return 0; + + parse_rtattr_flags(tb, IFLA_MAX, IFLA_RTA(ifi), len, NLA_F_NESTED); + + name = get_ifname_rta(ifi->ifi_index, tb[IFLA_IFNAME]); + if (!name) + return -1; + + print_headers(fp, "[LINK]"); + + open_json_object(NULL); + if (n->nlmsg_type == RTM_DELLINK) + print_bool(PRINT_ANY, "deleted", "Deleted ", true); + + print_int(PRINT_ANY, "ifindex", "%d: ", ifi->ifi_index); + m_flag = print_name_and_link("%s: ", name, tb); + print_link_flags(fp, ifi->ifi_flags, m_flag); + + if (tb[IFLA_MTU]) + print_int(PRINT_ANY, + "mtu", "mtu %u ", + rta_getattr_u32(tb[IFLA_MTU])); + + if (tb[IFLA_MASTER]) { + int master = rta_getattr_u32(tb[IFLA_MASTER]); + + print_string(PRINT_ANY, "master", "master %s ", + ll_index_to_name(master)); + } + + if (tb[IFLA_PROTINFO]) + print_protinfo(fp, tb[IFLA_PROTINFO]); + + if (tb[IFLA_AF_SPEC]) + print_af_spec(tb[IFLA_AF_SPEC], ifi->ifi_index); + + print_string(PRINT_FP, NULL, "%s", "\n"); + close_json_object(); + fflush(fp); + return 0; +} + +static void usage(void) +{ + fprintf(stderr, + "Usage: bridge link set dev DEV [ cost COST ] [ priority PRIO ] [ state STATE ]\n" + " [ guard {on | off} ]\n" + " [ hairpin {on | off} ]\n" + " [ fastleave {on | off} ]\n" + " [ root_block {on | off} ]\n" + " [ learning {on | off} ]\n" + " [ learning_sync {on | off} ]\n" + " [ flood {on | off} ]\n" + " [ mcast_router MULTICAST_ROUTER ]\n" + " [ mcast_flood {on | off} ]\n" + " [ bcast_flood {on | off} ]\n" + " [ mcast_to_unicast {on | off} ]\n" + " [ neigh_suppress {on | off} ]\n" + " [ vlan_tunnel {on | off} ]\n" + " [ isolated {on | off} ]\n" + " [ locked {on | off} ]\n" + " [ hwmode {vepa | veb} ]\n" + " [ backup_port DEVICE ] [ nobackup_port ]\n" + " [ self ] [ master ]\n" + " bridge link show [dev DEV]\n"); + exit(-1); +} + +static int brlink_modify(int argc, char **argv) +{ + struct { + struct nlmsghdr n; + struct ifinfomsg ifm; + char buf[512]; + } req = { + .n.nlmsg_len = NLMSG_LENGTH(sizeof(struct ifinfomsg)), + .n.nlmsg_flags = NLM_F_REQUEST, + .n.nlmsg_type = RTM_SETLINK, + .ifm.ifi_family = PF_BRIDGE, + }; + char *d = NULL; + int backup_port_idx = -1; + __s8 neigh_suppress = -1; + __s8 learning = -1; + __s8 learning_sync = -1; + __s8 flood = -1; + __s8 vlan_tunnel = -1; + __s8 mcast_router = -1; + __s8 mcast_flood = -1; + __s8 bcast_flood = -1; + __s8 mcast_to_unicast = -1; + __s8 locked = -1; + __s8 isolated = -1; + __s8 hairpin = -1; + __s8 bpdu_guard = -1; + __s8 fast_leave = -1; + __s8 root_block = -1; + __u32 cost = 0; + __s16 priority = -1; + __s8 state = -1; + __s16 mode = -1; + __u16 flags = 0; + struct rtattr *nest; + int ret; + + while (argc > 0) { + if (strcmp(*argv, "dev") == 0) { + NEXT_ARG(); + d = *argv; + } else if (strcmp(*argv, "guard") == 0) { + NEXT_ARG(); + bpdu_guard = parse_on_off("guard", *argv, &ret); + if (ret) + return ret; + } else if (strcmp(*argv, "hairpin") == 0) { + NEXT_ARG(); + hairpin = parse_on_off("hairpin", *argv, &ret); + if (ret) + return ret; + } else if (strcmp(*argv, "fastleave") == 0) { + NEXT_ARG(); + fast_leave = parse_on_off("fastleave", *argv, &ret); + if (ret) + return ret; + } else if (strcmp(*argv, "root_block") == 0) { + NEXT_ARG(); + root_block = parse_on_off("root_block", *argv, &ret); + if (ret) + return ret; + } else if (strcmp(*argv, "learning") == 0) { + NEXT_ARG(); + learning = parse_on_off("learning", *argv, &ret); + if (ret) + return ret; + } else if (strcmp(*argv, "learning_sync") == 0) { + NEXT_ARG(); + learning_sync = parse_on_off("learning_sync", *argv, &ret); + if (ret) + return ret; + } else if (strcmp(*argv, "flood") == 0) { + NEXT_ARG(); + flood = parse_on_off("flood", *argv, &ret); + if (ret) + return ret; + } else if (strcmp(*argv, "mcast_router") == 0) { + NEXT_ARG(); + mcast_router = atoi(*argv); + } else if (strcmp(*argv, "mcast_flood") == 0) { + NEXT_ARG(); + mcast_flood = parse_on_off("mcast_flood", *argv, &ret); + if (ret) + return ret; + } else if (strcmp(*argv, "bcast_flood") == 0) { + NEXT_ARG(); + bcast_flood = parse_on_off("bcast_flood", *argv, &ret); + if (ret) + return ret; + } else if (strcmp(*argv, "mcast_to_unicast") == 0) { + NEXT_ARG(); + mcast_to_unicast = parse_on_off("mcast_to_unicast", *argv, &ret); + if (ret) + return ret; + } else if (strcmp(*argv, "cost") == 0) { + NEXT_ARG(); + cost = atoi(*argv); + } else if (strcmp(*argv, "priority") == 0) { + NEXT_ARG(); + priority = atoi(*argv); + } else if (strcmp(*argv, "state") == 0) { + NEXT_ARG(); + char *endptr; + + state = strtol(*argv, &endptr, 10); + if (!(**argv != '\0' && *endptr == '\0')) { + state = parse_stp_state(*argv); + if (state == -1) { + fprintf(stderr, + "Error: invalid STP port state\n"); + return -1; + } + } + } else if (strcmp(*argv, "hwmode") == 0) { + NEXT_ARG(); + flags = BRIDGE_FLAGS_SELF; + if (strcmp(*argv, "vepa") == 0) + mode = BRIDGE_MODE_VEPA; + else if (strcmp(*argv, "veb") == 0) + mode = BRIDGE_MODE_VEB; + else { + fprintf(stderr, + "Mode argument must be \"vepa\" or \"veb\".\n"); + return -1; + } + } else if (strcmp(*argv, "self") == 0) { + flags |= BRIDGE_FLAGS_SELF; + } else if (strcmp(*argv, "master") == 0) { + flags |= BRIDGE_FLAGS_MASTER; + } else if (strcmp(*argv, "neigh_suppress") == 0) { + NEXT_ARG(); + neigh_suppress = parse_on_off("neigh_suppress", *argv, &ret); + if (ret) + return ret; + } else if (strcmp(*argv, "vlan_tunnel") == 0) { + NEXT_ARG(); + vlan_tunnel = parse_on_off("vlan_tunnel", *argv, &ret); + if (ret) + return ret; + } else if (strcmp(*argv, "isolated") == 0) { + NEXT_ARG(); + isolated = parse_on_off("isolated", *argv, &ret); + if (ret) + return ret; + } else if (strcmp(*argv, "locked") == 0) { + NEXT_ARG(); + locked = parse_on_off("locked", *argv, &ret); + if (ret) + return ret; + } else if (strcmp(*argv, "backup_port") == 0) { + NEXT_ARG(); + backup_port_idx = ll_name_to_index(*argv); + if (!backup_port_idx) { + fprintf(stderr, "Error: device %s does not exist\n", + *argv); + return -1; + } + } else if (strcmp(*argv, "nobackup_port") == 0) { + backup_port_idx = 0; + } else { + usage(); + } + argc--; argv++; + } + if (d == NULL) { + fprintf(stderr, "Device is a required argument.\n"); + return -1; + } + + + req.ifm.ifi_index = ll_name_to_index(d); + if (req.ifm.ifi_index == 0) { + fprintf(stderr, "Cannot find bridge device \"%s\"\n", d); + return -1; + } + + /* Nested PROTINFO attribute. Contains: port flags, cost, priority and + * state. + */ + nest = addattr_nest(&req.n, sizeof(req), + IFLA_PROTINFO | NLA_F_NESTED); + /* Flags first */ + if (bpdu_guard >= 0) + addattr8(&req.n, sizeof(req), IFLA_BRPORT_GUARD, bpdu_guard); + if (hairpin >= 0) + addattr8(&req.n, sizeof(req), IFLA_BRPORT_MODE, hairpin); + if (fast_leave >= 0) + addattr8(&req.n, sizeof(req), IFLA_BRPORT_FAST_LEAVE, + fast_leave); + if (root_block >= 0) + addattr8(&req.n, sizeof(req), IFLA_BRPORT_PROTECT, root_block); + if (flood >= 0) + addattr8(&req.n, sizeof(req), IFLA_BRPORT_UNICAST_FLOOD, flood); + if (mcast_router >= 0) + addattr8(&req.n, sizeof(req), IFLA_BRPORT_MULTICAST_ROUTER, + mcast_router); + if (mcast_flood >= 0) + addattr8(&req.n, sizeof(req), IFLA_BRPORT_MCAST_FLOOD, + mcast_flood); + if (bcast_flood >= 0) + addattr8(&req.n, sizeof(req), IFLA_BRPORT_BCAST_FLOOD, + bcast_flood); + if (mcast_to_unicast >= 0) + addattr8(&req.n, sizeof(req), IFLA_BRPORT_MCAST_TO_UCAST, + mcast_to_unicast); + if (learning >= 0) + addattr8(&req.n, sizeof(req), IFLA_BRPORT_LEARNING, learning); + if (learning_sync >= 0) + addattr8(&req.n, sizeof(req), IFLA_BRPORT_LEARNING_SYNC, + learning_sync); + + if (cost > 0) + addattr32(&req.n, sizeof(req), IFLA_BRPORT_COST, cost); + + if (priority >= 0) + addattr16(&req.n, sizeof(req), IFLA_BRPORT_PRIORITY, priority); + + if (state >= 0) + addattr8(&req.n, sizeof(req), IFLA_BRPORT_STATE, state); + + if (neigh_suppress != -1) + addattr8(&req.n, sizeof(req), IFLA_BRPORT_NEIGH_SUPPRESS, + neigh_suppress); + if (vlan_tunnel != -1) + addattr8(&req.n, sizeof(req), IFLA_BRPORT_VLAN_TUNNEL, + vlan_tunnel); + if (isolated != -1) + addattr8(&req.n, sizeof(req), IFLA_BRPORT_ISOLATED, isolated); + + if (locked >= 0) + addattr8(&req.n, sizeof(req), IFLA_BRPORT_LOCKED, locked); + + if (backup_port_idx != -1) + addattr32(&req.n, sizeof(req), IFLA_BRPORT_BACKUP_PORT, + backup_port_idx); + + addattr_nest_end(&req.n, nest); + + /* IFLA_AF_SPEC nested attribute. Contains IFLA_BRIDGE_FLAGS that + * designates master or self operation and IFLA_BRIDGE_MODE + * for hw 'vepa' or 'veb' operation modes. The hwmodes are + * only valid in 'self' mode on some devices so far. + */ + if (mode >= 0 || flags > 0) { + nest = addattr_nest(&req.n, sizeof(req), IFLA_AF_SPEC); + + if (flags > 0) + addattr16(&req.n, sizeof(req), IFLA_BRIDGE_FLAGS, flags); + + if (mode >= 0) + addattr16(&req.n, sizeof(req), IFLA_BRIDGE_MODE, mode); + + addattr_nest_end(&req.n, nest); + } + + if (rtnl_talk(&rth, &req.n, NULL) < 0) + return -1; + + return 0; +} + +static int brlink_show(int argc, char **argv) +{ + char *filter_dev = NULL; + + while (argc > 0) { + if (strcmp(*argv, "dev") == 0) { + NEXT_ARG(); + if (filter_dev) + duparg("dev", *argv); + filter_dev = *argv; + } + argc--; argv++; + } + + if (filter_dev) { + filter_index = ll_name_to_index(filter_dev); + if (!filter_index) + return nodev(filter_dev); + } + + if (rtnl_linkdump_req(&rth, PF_BRIDGE) < 0) { + perror("Cannot send dump request"); + exit(1); + } + + new_json_obj(json); + if (rtnl_dump_filter(&rth, print_linkinfo, stdout) < 0) { + fprintf(stderr, "Dump terminated\n"); + exit(1); + } + + delete_json_obj(); + fflush(stdout); + return 0; +} + +int do_link(int argc, char **argv) +{ + ll_init_map(&rth); + timestamp = 0; + + if (argc > 0) { + if (matches(*argv, "set") == 0 || + matches(*argv, "change") == 0) + return brlink_modify(argc-1, argv+1); + if (matches(*argv, "show") == 0 || + matches(*argv, "lst") == 0 || + matches(*argv, "list") == 0) + return brlink_show(argc-1, argv+1); + if (matches(*argv, "help") == 0) + usage(); + } else + return brlink_show(0, NULL); + + fprintf(stderr, "Command \"%s\" is unknown, try \"bridge link help\".\n", *argv); + exit(-1); +} |